<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <title>后盾人</title>
  </head>
  <body></body>
  <script>
    let hd = new Object();
    hd.name = "后盾人";
    Object.prototype.show = function() {
      console.log("hodunren.com");
    };
    hd.show();
    function User() {}
    let xj = new User();
    xj.show();
    User.show();
  </script>
</html>
